Piston.



SAMUEL W. MILLER, OF PHILADELPHIA, PENNSYLVANIA.

PISTON.

Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed July 9, 1.906. Serial No. 325,241.

To all whom it may concern:

Be it known that I, SAMUEL W. MILLER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a cer tain new and useful Improvement in Pistons, of which the following is a specification.

The object of this invention is to simplify and cheapen the construction of piston-heads.

The invention consists of the construction hereinafter described and claimed.

In the accompanying drawings, in which I have illustrated one embodiment of the invention, Figure 1 is a diametrical sectional view of the head on the rod, but before it is secured thereto. Fig. 2 is a sectional and elevational view looking from a plane 00 :c, Fig. 1 and Fig. 3 is a diametrical sectional view of the head on the rod and secured thereto.

In the views, 1 designates the bull-ring, which has the usual packing-rings 1 The inner corners of the bull-ring are cut away to form angular rabbet-like seats 1 2 designates what I shall denominate the inner plate, and 3 the outer plate. The

. plates are cast with hubs 2 and 3*, respectively, and are ribbed, as seen at 2' and 3*, respectively. The edges or rims of the plates are out to form angular edges 2 and 3, corresponding to the seats 1 in the opposite sides of the bull-ring.

4 designates the end of the pistonrod, which is tapered from a shoulder 4 to form a seat for corresponding openings in the hubs of the plates 2 and 3. The extreme end of the piston is threaded to receive a lockingnut 5.

My method, Which can be varied, of manufacturing the piston-head is as follows: The plates 2 and 3 are faced off at the adjacent ends of their hubs. The plates are then bolted together to a lathe face-plate and the taper fit for the piston-rodbored in both at the same time. They are then placed on a taper mandrel and drawn together by a nut like that designated 5, and the angular corners at the rims turned. When the rims of the plate are thus turned, the plates are left of a trifle larger diameter than the corresponding dimension of the seats in the bullin plate will make a tight fit. When the seats for the plates in the bull-ring are cut,

the distance between said seats is made such that when the plates areseated in the bullring a small space is left between the adjacent faces of the hubs of the plates, as depicted in Fig. 1, so that it shall require some pressure of the securing-nut to draw the hubs together and seat the outer plate on the taper of the piston-rod, as seen in Fig. 3. v

It will be observed that the piston-head proper is made of three pieces only and that these pieces are easily cast and shaped to the required form. The disadvantages of shifting cores, as where a head is made solid or in one piece, are avoided. When worn, the bull-ring can be replaced with another, and therefore without loss of the side plates.

What I claim, and desire to secure by Letters Patent, is-

1. A piston-head comprising the two side plates, in combination with an integral bullring, the bull-ring being rabbeted at its inner corners to receive the edges of the side plates.

2. A piston-head comprising the two side plates provided with tapering seating-open ings, in combination with the bull-ring, the bull-ring being rabbeted to receive the edges of the side plates, and the side plates normally separated at their centers before application to the piston-rod and adapted to be sprung together when secured on the rod.

3. A piston-head comprising the two side plates each provided with a tapered opening,

. a bull-ring rabbeted to receive the edges of the side plates and the side plates normally separated at their centers before application to the piston-rod and adapted to be sprung together when secured on the rod, in combination with a rod having a taper seat 011 which the plates fit at their aforesaid openings and means for springing said plates together on the rods.

SAMUEL W. MILLER.

Witnesses:

H. HUsK, F. J. SGHAEFER. 

